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| <a href="_compression_tools_8cs.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* </span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * contributor license agreements. See the NOTICE file distributed with</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * this work for additional information regarding copyright ownership.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * (the "License"); you may not use this file except in compliance with</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * the License. You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * limitations under the License.</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">// To enable compression support in Lucene.Net ,</span></div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// you will need to define 'SHARP_ZIP_LIB' and reference the SharpLibZip </span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// library. The SharpLibZip library can be downloaded from: </span></div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// http://www.icsharpcode.net/OpenSource/SharpZipLib/</span></div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">using</span> System;</div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">using</span> Lucene.Net.Support;</div> |
| <div class="line"><a name="l00026"></a><span class="lineno"><a class="code" href="_compression_tools_8cs.html#ac6445f47719a63eecd9434c88ae8b7df"> 26</a></span> <span class="keyword">using</span> <a class="code" href="_compression_tools_8cs.html#ac6445f47719a63eecd9434c88ae8b7df">UnicodeUtil</a> = Lucene.Net.Util.UnicodeUtil;</div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">namespace </span>Lucene.Net.<a class="code" href="_index_set_8cs.html#ab0c91be630b1f43f2379cc5964ed640c">Documents</a></div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> {</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  </div> |
| <div class="line"><a name="l00037"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html"> 37</a></span>  <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html" title="Simple utility class providing static methods to compress and decompress binary data for stored field...">CompressionTools</a></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  {</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  </div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// Export only static methods</span></div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">private</span> <a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html" title="Simple utility class providing static methods to compress and decompress binary data for stored field...">CompressionTools</a>()</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  {</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  }</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div> |
| <div class="line"><a name="l00049"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html#a14d943937de42347ff0c96ef5b229143"> 49</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> byte[] Compress(byte[] value_Renamed, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> length, <span class="keywordtype">int</span> compressionLevel)</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  {</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="comment">/* Create an expandable byte array to hold the compressed data.</span></div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * You cannot use an array that's the same size as the orginal because</span></div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * there is no guarantee that the compressed data will be smaller than</span></div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * the uncompressed data. */</span></div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  System.IO.MemoryStream bos = <span class="keyword">new</span> System.IO.MemoryStream(length);</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html">Deflater</a> compressor = <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_sharp_zip_lib.html">SharpZipLib</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_sharp_zip_lib.html#a26972db5f76f1bff0cd89bbec7e9c92f">CreateDeflater</a>();</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  </div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">try</span></div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  {</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  compressor.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html#a82446dc0814bd04fa9727a08c1d73fc5">SetLevel</a>(compressionLevel);</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  compressor.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html#a3168cb449bb4f348fa030e8ca23cf6ee">SetInput</a>(value_Renamed, offset, length);</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  compressor.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html#af061b3d1ab25ba1dd869952a604c1ac1">Finish</a>();</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  </div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">// Compress the data</span></div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  byte[] buf = <span class="keyword">new</span> byte[1024];</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">while</span> (!compressor.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html#ae17922b892ccba0a77b65accae3a5e14">IsFinished</a>)</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  {</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordtype">int</span> count = compressor.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html#a2475fb271329d0a4e6997ee9101351b3">Deflate</a>(buf);</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  bos.Write(buf, 0, count);</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  }</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">finally</span></div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  {</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  }</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  </div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">return</span> bos.ToArray();</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  }</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  </div> |
| <div class="line"><a name="l00081"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html#a611e1e06710d9bb1fc22bfd94768886f"> 81</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> byte[] Compress(byte[] value_Renamed, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> length)</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  {</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">return</span> Compress(value_Renamed, offset, length, <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html">Deflater</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html#a8e85a87088f971156ccd04b9fa8378ea">BEST_COMPRESSION</a>);</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  }</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div> |
| <div class="line"><a name="l00087"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html#a0857346cc055dec9404a6f8831649d92"> 87</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> byte[] Compress(byte[] value_Renamed)</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  {</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> Compress(value_Renamed, 0, value_Renamed.Length, <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html">Deflater</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html#a8e85a87088f971156ccd04b9fa8378ea">BEST_COMPRESSION</a>);</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  }</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  </div> |
| <div class="line"><a name="l00093"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html#a32423a2241c449e1e03b4384fc13ad79"> 93</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> byte[] CompressString(System.String value_Renamed)</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  {</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">return</span> CompressString(value_Renamed, <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html">Deflater</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_deflater.html#a8e85a87088f971156ccd04b9fa8378ea">BEST_COMPRESSION</a>);</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  </div> |
| <div class="line"><a name="l00102"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html#a143215ae45950799f66ac42b2bc0a2fa"> 102</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> byte[] CompressString(System.String value_Renamed, <span class="keywordtype">int</span> compressionLevel)</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  {</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <a class="code" href="_compression_tools_8cs.html#ac6445f47719a63eecd9434c88ae8b7df">UnicodeUtil</a>.UTF8Result result = <span class="keyword">new</span> <a class="code" href="_compression_tools_8cs.html#ac6445f47719a63eecd9434c88ae8b7df">UnicodeUtil</a>.UTF8Result();</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <a class="code" href="_compression_tools_8cs.html#ac6445f47719a63eecd9434c88ae8b7df">UnicodeUtil</a>.UTF16toUTF8(value_Renamed, 0, value_Renamed.Length, result);</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">return</span> Compress(result.result, 0, result.length, compressionLevel);</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  </div> |
| <div class="line"><a name="l00112"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html#a0968f6156b75a2908b001cf57d15bbec"> 112</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> byte[] Decompress(byte[] value_Renamed)</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  {</div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="comment">// Create an expandable byte array to hold the decompressed data</span></div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  System.IO.MemoryStream bos = <span class="keyword">new</span> System.IO.MemoryStream(value_Renamed.Length);</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_inflater.html">Inflater</a> decompressor = <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_sharp_zip_lib.html">SharpZipLib</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_sharp_zip_lib.html#aff3bd1d5db198ca4b264411eb969c09d">CreateInflater</a>();</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  </div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">try</span></div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  {</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  decompressor.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_inflater.html#a228c20e2630a8496ec84999ed4b4c107">SetInput</a>(value_Renamed);</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  </div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="comment">// Decompress the data</span></div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  byte[] buf = <span class="keyword">new</span> byte[1024];</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">while</span> (!decompressor.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_inflater.html#a9f471c4fdc65c873b5d0bc6b17af7ae1">IsFinished</a>)</div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  {</div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordtype">int</span> count = decompressor.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_inflater.html#aa4be82e4fef7903fa4fa4089f4602e06">Inflate</a>(buf);</div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  bos.Write(buf, 0, count);</div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  }</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">finally</span></div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  {</div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  }</div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  </div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">return</span> bos.ToArray();</div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  }</div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  </div> |
| <div class="line"><a name="l00141"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_compression_tools.html#ae751b826b883f885bbe15226375c28e2"> 141</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> System.String DecompressString(byte[] value_Renamed)</div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  {</div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <a class="code" href="_compression_tools_8cs.html#ac6445f47719a63eecd9434c88ae8b7df">UnicodeUtil</a>.UTF16Result result = <span class="keyword">new</span> <a class="code" href="_compression_tools_8cs.html#ac6445f47719a63eecd9434c88ae8b7df">UnicodeUtil</a>.UTF16Result();</div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  byte[] bytes = Decompress(value_Renamed);</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <a class="code" href="_compression_tools_8cs.html#ac6445f47719a63eecd9434c88ae8b7df">UnicodeUtil</a>.UTF8toUTF16(bytes, 0, bytes.Length, result);</div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> System.String(result.result, 0, result.length);</div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  }</div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> }</div> |
| <div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div> |
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